Rolex Explorer II 16570 Black Swiss Only Dial with Original Punched Paper fn-blue - Piguet-based Cal 21 Manual

- Piguet-based Cal 21 Manual wind movement

These cases are unusually large for the era

The watch is fitted with a great condition solid link Oyster bracelet reference 93150 with 501b endlinks and a clasp stamped ‘M9’

This one has a black glossy dial with crisp white text and unusual hour markers at six and nine for a quickset watch

Rolex Explorer II 16570 Black Swiss Only Dial with Original Punched Paper fn-blue - Piguet-based Cal 21 ManualThe Rolex Explorer II was introduced in 1971 as a rugged, professional tool watch designed for explorers, spelunkers, and adventurers operating in extreme conditions. Unlike the original Explorer (1953), which celebrated Everest expeditions and high altitude exploration, the Explorer II was specifically made for environments where daylight is limited or nonexistent, such as caves or polar regions. Its most distinctive feature is the fixed 24 hour